/*!
 * QUnit 1.13.0
 * http://qunitjs.com/
 *
 * Copyright 2013 jQuery Foundation and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: 2014-01-04T17:09Z
 */

(function( window ) {

    var QUnit,
        assert,
        config,
        onErrorFnPrev,
        testId = 0,
        fileName = (sourceFromStacktrace( 0 ) || "" ).replace(/(:\d+)+\)?/, "").replace(/.+\//, ""),
        toString = Object.prototype.toString,
        hasOwn = Object.prototype.hasOwnProperty,
    // Keep a local reference to Date (GH-283)
        Date = window.Date,
        setTimeout = window.setTimeout,
        defined = {
            document: typeof window.document !== "undefined",
            setTimeout: typeof window.setTimeout !== "undefined",
            sessionStorage: (function() {
                var x = "qunit-test-string";
                try {
                    sessionStorage.setItem( x, x );
                    sessionStorage.removeItem( x );
                    return true;
                } catch( e ) {
                    return false;
                }
            }())
        },
        /**
         * Provides a normalized error string, correcting an issue
         * with IE 7 (and prior) where Error.prototype.toString is
         * not properly implemented
         *
         * Based on http://es5.github.com/#x15.11.4.4
         *
         * @param {String|Error} error
         * @return {String} error message
         */
        errorString = function( error ) {
            var name, message,
                errorString = error.toString();
            if ( errorString.substring( 0, 7 ) === "[object" ) {
                name = error.name ? error.name.toString() : "Error";
                message = error.message ? error.message.toString() : "";
                if ( name && message ) {
                    return name + ": " + message;
                } else if ( name ) {
                    return name;
                } else if ( message ) {
                    return message;
                } else {
                    return "Error";
                }
            } else {
                return errorString;
            }
        },
        /**
         * Makes a clone of an object using only Array or Object as base,
         * and copies over the own enumerable properties.
         *
         * @param {Object} obj
         * @return {Object} New object with only the own properties (recursively).
         */
        objectValues = function( obj ) {
            // Grunt 0.3.x uses an older version of jshint that still has jshint/jshint#392.
            /*jshint newcap: false */
            var key, val,
                vals = QUnit.is( "array", obj ) ? [] : {};
            for ( key in obj ) {
                if ( hasOwn.call( obj, key ) ) {
                    val = obj[key];
                    vals[key] = val === Object(val) ? objectValues(val) : val;
                }
            }
            return vals;
        };


// Root QUnit object.
// `QUnit` initialized at top of scope
    QUnit = {

        // call on start of module test to prepend name to all tests
        module: function( name, testEnvironment ) {
            config.currentModule = name;
            config.currentModuleTestEnvironment = testEnvironment;
            config.modules[name] = true;
        },

        asyncTest: function( testName, expected, callback ) {
            if ( arguments.length === 2 ) {
                callback = expected;
                expected = null;
            }

            QUnit.test( testName, expected, callback, true );
        },

        test: function( testName, expected, callback, async ) {
            var test,
                nameHtml = "<span class='test-name'>" + escapeText( testName ) + "</span>";

            if ( arguments.length === 2 ) {
                callback = expected;
                expected = null;
            }

            if ( config.currentModule ) {
                nameHtml = "<span class='module-name'>" + escapeText( config.currentModule ) + "</span>: " + nameHtml;
            }

            test = new Test({
                nameHtml: nameHtml,
                testName: testName,
                expected: expected,
                async: async,
                callback: callback,
                module: config.currentModule,
                moduleTestEnvironment: config.currentModuleTestEnvironment,
                stack: sourceFromStacktrace( 2 )
            });

            if ( !validTest( test ) ) {
                return;
            }

            test.queue();
        },

        // Specify the number of expected assertions to guarantee that failed test (no assertions are run at all) don't slip through.
        expect: function( asserts ) {
            if (arguments.length === 1) {
                config.current.expected = asserts;
            } else {
                return config.current.expected;
            }
        },

        start: function( count ) {
            // QUnit hasn't been initialized yet.
            // Note: RequireJS (et al) may delay onLoad
            if ( config.semaphore === undefined ) {
                QUnit.begin(function() {
                    // This is triggered at the top of QUnit.load, push start() to the event loop, to allow QUnit.load to finish first
                    setTimeout(function() {
                        QUnit.start( count );
                    });
                });
                return;
            }

            config.semaphore -= count || 1;
            // don't start until equal number of stop-calls
            if ( config.semaphore > 0 ) {
                return;
            }
            // ignore if start is called more often then stop
            if ( config.semaphore < 0 ) {
                config.semaphore = 0;
                QUnit.pushFailure( "Called start() while already started (QUnit.config.semaphore was 0 already)", null, sourceFromStacktrace(2) );
                return;
            }
            // A slight delay, to avoid any current callbacks
            if ( defined.setTimeout ) {
                setTimeout(function() {
                    if ( config.semaphore > 0 ) {
                        return;
                    }
                    if ( config.timeout ) {
                        clearTimeout( config.timeout );
                    }

                    config.blocking = false;
                    process( true );
                }, 13);
            } else {
                config.blocking = false;
                process( true );
            }
        },

        stop: function( count ) {
            config.semaphore += count || 1;
            config.blocking = true;

            if ( config.testTimeout && defined.setTimeout ) {
                clearTimeout( config.timeout );
                config.timeout = setTimeout(function() {
                    QUnit.ok( false, "Test timed out" );
                    config.semaphore = 1;
                    QUnit.start();
                }, config.testTimeout );
            }
        }
    };

// We use the prototype to distinguish between properties that should
// be exposed as globals (and in exports) and those that shouldn't
    (function() {
        function F() {}
        F.prototype = QUnit;
        QUnit = new F();
        // Make F QUnit's constructor so that we can add to the prototype later
        QUnit.constructor = F;
    }());

    /**
     * Config object: Maintain internal state
     * Later exposed as QUnit.config
     * `config` initialized at top of scope
     */
    config = {
        // The queue of tests to run
        queue: [],

        // block until document ready
        blocking: true,

        // when enabled, show only failing tests
        // gets persisted through sessionStorage and can be changed in UI via checkbox
        hidepassed: false,

        // by default, run previously failed tests first
        // very useful in combination with "Hide passed tests" checked
        reorder: true,

        // by default, modify document.title when suite is done
        altertitle: true,

        // when enabled, all tests must call expect()
        requireExpects: false,

        // add checkboxes that are persisted in the query-string
        // when enabled, the id is set to `true` as a `QUnit.config` property
        urlConfig: [
            {
                id: "noglobals",
                label: "Check for Globals",
                tooltip: "Enabling this will test if any test introduces new properties on the `window` object. Stored as query-strings."
            },
            {
                id: "notrycatch",
                label: "No try-catch",
                tooltip: "Enabling this will run tests outside of a try-catch block. Makes debugging exceptions in IE reasonable. Stored as query-strings."
            }
        ],

        // Set of all modules.
        modules: {},

        // logging callback queues
        begin: [],
        done: [],
        log: [],
        testStart: [],
        testDone: [],
        moduleStart: [],
        moduleDone: []
    };

// Initialize more QUnit.config and QUnit.urlParams
    (function() {
        var i,
            location = window.location || { search: "", protocol: "file:" },
            params = location.search.slice( 1 ).split( "&" ),
            length = params.length,
            urlParams = {},
            current;

        if ( params[ 0 ] ) {
            for ( i = 0; i < length; i++ ) {
                current = params[ i ].split( "=" );
                current[ 0 ] = decodeURIComponent( current[ 0 ] );
                // allow just a key to turn on a flag, e.g., test.html?noglobals
                current[ 1 ] = current[ 1 ] ? decodeURIComponent( current[ 1 ] ) : true;
                urlParams[ current[ 0 ] ] = current[ 1 ];
            }
        }

        QUnit.urlParams = urlParams;

        // String search anywhere in moduleName+testName
        config.filter = urlParams.filter;

        // Exact match of the module name
        config.module = urlParams.module;

        config.testNumber = parseInt( urlParams.testNumber, 10 ) || null;

        // Figure out if we're running the tests from a server or not
        QUnit.isLocal = location.protocol === "file:";
    }());

    extend( QUnit, {

        config: config,

        // Initialize the configuration options
        init: function() {
            extend( config, {
                stats: { all: 0, bad: 0 },
                moduleStats: { all: 0, bad: 0 },
                started: +new Date(),
                updateRate: 1000,
                blocking: false,
                autostart: true,
                autorun: false,
                filter: "",
                queue: [],
                semaphore: 1
            });

            var tests, banner, result,
                qunit = id( "qunit" );

            if ( qunit ) {
                qunit.innerHTML =
                    "<h1 id='qunit-header'>" + escapeText( document.title ) + "</h1>" +
                    "<h2 id='qunit-banner'></h2>" +
                    "<div id='qunit-testrunner-toolbar'></div>" +
                    "<h2 id='qunit-userAgent'></h2>" +
                    "<ol id='qunit-tests'></ol>";
            }

            tests = id( "qunit-tests" );
            banner = id( "qunit-banner" );
            result = id( "qunit-testresult" );

            if ( tests ) {
                tests.innerHTML = "";
            }

            if ( banner ) {
                banner.className = "";
            }

            if ( result ) {
                result.parentNode.removeChild( result );
            }

            if ( tests ) {
                result = document.createElement( "p" );
                result.id = "qunit-testresult";
                result.className = "result";
                tests.parentNode.insertBefore( result, tests );
                result.innerHTML = "Running...<br/>&nbsp;";
            }
        },

        // Resets the test setup. Useful for tests that modify the DOM.
        /*
         DEPRECATED: Use multiple tests instead of resetting inside a test.
         Use testStart or testDone for custom cleanup.
         This method will throw an error in 2.0, and will be removed in 2.1
         */
        reset: function() {
            var fixture = id( "qunit-fixture" );
            if ( fixture ) {
                fixture.innerHTML = config.fixture;
            }
        },

        // Safe object type checking
        is: function( type, obj ) {
            return QUnit.objectType( obj ) === type;
        },

        objectType: function( obj ) {
            if ( typeof obj === "undefined" ) {
                return "undefined";
            }

            // Consider: typeof null === object
            if ( obj === null ) {
                return "null";
            }

            var match = toString.call( obj ).match(/^\[object\s(.*)\]$/),
                type = match && match[1] || "";

            switch ( type ) {
                case "Number":
                    if ( isNaN(obj) ) {
                        return "nan";
                    }
                    return "number";
                case "String":
                case "Boolean":
                case "Array":
                case "Date":
                case "RegExp":
                case "Function":
                    return type.toLowerCase();
            }
            if ( typeof obj === "object" ) {
                return "object";
            }
            return undefined;
        },

        push: function( result, actual, expected, message ) {
            if ( !config.current ) {
                throw new Error( "assertion outside test context, was " + sourceFromStacktrace() );
            }

            var output, source,
                details = {
                    module: config.current.module,
                    name: config.current.testName,
                    result: result,
                    message: message,
                    actual: actual,
                    expected: expected
                };

            message = escapeText( message ) || ( result ? "okay" : "failed" );
            message = "<span class='test-message'>" + message + "</span>";
            output = message;

            if ( !result ) {
                expected = escapeText( QUnit.jsDump.parse(expected) );
                actual = escapeText( QUnit.jsDump.parse(actual) );
                output += "<table><tr class='test-expected'><th>Expected: </th><td><pre>" + expected + "</pre></td></tr>";

                if ( actual !== expected ) {
                    output += "<tr class='test-actual'><th>Result: </th><td><pre>" + actual + "</pre></td></tr>";
                    output += "<tr class='test-diff'><th>Diff: </th><td><pre>" + QUnit.diff( expected, actual ) + "</pre></td></tr>";
                }

                source = sourceFromStacktrace();

                if ( source ) {
                    details.source = source;
                    output += "<tr class='test-source'><th>Source: </th><td><pre>" + escapeText( source ) + "</pre></td></tr>";
                }

                output += "</table>";
            }

            runLoggingCallbacks( "log", QUnit, details );

            config.current.assertions.push({
                result: !!result,
                message: output
            });
        },

        pushFailure: function( message, source, actual ) {
            if ( !config.current ) {
                throw new Error( "pushFailure() assertion outside test context, was " + sourceFromStacktrace(2) );
            }

            var output,
                details = {
                    module: config.current.module,
                    name: config.current.testName,
                    result: false,
                    message: message
                };

            message = escapeText( message ) || "error";
            message = "<span class='test-message'>" + message + "</span>";
            output = message;

            output += "<table>";

            if ( actual ) {
                output += "<tr class='test-actual'><th>Result: </th><td><pre>" + escapeText( actual ) + "</pre></td></tr>";
            }

            if ( source ) {
                details.source = source;
                output += "<tr class='test-source'><th>Source: </th><td><pre>" + escapeText( source ) + "</pre></td></tr>";
            }

            output += "</table>";

            runLoggingCallbacks( "log", QUnit, details );

            config.current.assertions.push({
                result: false,
                message: output
            });
        },

        url: function( params ) {
            params = extend( extend( {}, QUnit.urlParams ), params );
            var key,
                querystring = "?";

            for ( key in params ) {
                if ( hasOwn.call( params, key ) ) {
                    querystring += encodeURIComponent( key ) + "=" +
                        encodeURIComponent( params[ key ] ) + "&";
                }
            }
            return window.location.protocol + "//" + window.location.host +
                window.location.pathname + querystring.slice( 0, -1 );
        },

        extend: extend,
        id: id,
        addEvent: addEvent,
        addClass: addClass,
        hasClass: hasClass,
        removeClass: removeClass
        // load, equiv, jsDump, diff: Attached later
    });

    /**
     * @deprecated: Created for backwards compatibility with test runner that set the hook function
     * into QUnit.{hook}, instead of invoking it and passing the hook function.
     * QUnit.constructor is set to the empty F() above so that we can add to it's prototype here.
     * Doing this allows us to tell if the following methods have been overwritten on the actual
     * QUnit object.
     */
    extend( QUnit.constructor.prototype, {

        // Logging callbacks; all receive a single argument with the listed properties
        // run test/logs.html for any related changes
        begin: registerLoggingCallback( "begin" ),

        // done: { failed, passed, total, runtime }
        done: registerLoggingCallback( "done" ),

        // log: { result, actual, expected, message }
        log: registerLoggingCallback( "log" ),

        // testStart: { name }
        testStart: registerLoggingCallback( "testStart" ),

        // testDone: { name, failed, passed, total, runtime }
        testDone: registerLoggingCallback( "testDone" ),

        // moduleStart: { name }
        moduleStart: registerLoggingCallback( "moduleStart" ),

        // moduleDone: { name, failed, passed, total }
        moduleDone: registerLoggingCallback( "moduleDone" )
    });

    if ( !defined.document || document.readyState === "complete" ) {
        config.autorun = true;
    }

    QUnit.load = function() {
        runLoggingCallbacks( "begin", QUnit, {} );

        // Initialize the config, saving the execution queue
        var banner, filter, i, label, len, main, ol, toolbar, userAgent, val,
            urlConfigCheckboxesContainer, urlConfigCheckboxes, moduleFilter,
            numModules = 0,
            moduleNames = [],
            moduleFilterHtml = "",
            urlConfigHtml = "",
            oldconfig = extend( {}, config );

        QUnit.init();
        extend(config, oldconfig);

        config.blocking = false;

        len = config.urlConfig.length;

        for ( i = 0; i < len; i++ ) {
            val = config.urlConfig[i];
            if ( typeof val === "string" ) {
                val = {
                    id: val,
                    label: val,
                    tooltip: "[no tooltip available]"
                };
            }
            config[ val.id ] = QUnit.urlParams[ val.id ];
            urlConfigHtml += "<input id='qunit-urlconfig-" + escapeText( val.id ) +
                "' name='" + escapeText( val.id ) +
                "' type='checkbox'" + ( config[ val.id ] ? " checked='checked'" : "" ) +
                " title='" + escapeText( val.tooltip ) +
                "'><label for='qunit-urlconfig-" + escapeText( val.id ) +
                "' title='" + escapeText( val.tooltip ) + "'>" + val.label + "</label>";
        }
        for ( i in config.modules ) {
            if ( config.modules.hasOwnProperty( i ) ) {
                moduleNames.push(i);
            }
        }
        numModules = moduleNames.length;
        moduleNames.sort( function( a, b ) {
            return a.localeCompare( b );
        });
        moduleFilterHtml += "<label for='qunit-modulefilter'>Module: </label><select id='qunit-modulefilter' name='modulefilter'><option value='' " +
            ( config.module === undefined  ? "selected='selected'" : "" ) +
            ">< All Modules ></option>";


        for ( i = 0; i < numModules; i++) {
            moduleFilterHtml += "<option value='" + escapeText( encodeURIComponent(moduleNames[i]) ) + "' " +
                ( config.module === moduleNames[i] ? "selected='selected'" : "" ) +
                ">" + escapeText(moduleNames[i]) + "</option>";
        }
        moduleFilterHtml += "</select>";

        // `userAgent` initialized at top of scope
        userAgent = id( "qunit-userAgent" );
        if ( userAgent ) {
            userAgent.innerHTML = navigator.userAgent;
        }

        // `banner` initialized at top of scope
        banner = id( "qunit-header" );
        if ( banner ) {
            banner.innerHTML = "<a href='" + QUnit.url({ filter: undefined, module: undefined, testNumber: undefined }) + "'>" + banner.innerHTML + "</a> ";
        }

        // `toolbar` initialized at top of scope
        toolbar = id( "qunit-testrunner-toolbar" );
        if ( toolbar ) {
            // `filter` initialized at top of scope
            filter = document.createElement( "input" );
            filter.type = "checkbox";
            filter.id = "qunit-filter-pass";

            addEvent( filter, "click", function() {
                var tmp,
                    ol = id( "qunit-tests" );

                if ( filter.checked ) {
                    ol.className = ol.className + " hidepass";
                } else {
                    tmp = " " + ol.className.replace( /[\n\t\r]/g, " " ) + " ";
                    ol.className = tmp.replace( / hidepass /, " " );
                }
                if ( defined.sessionStorage ) {
                    if (filter.checked) {
                        sessionStorage.setItem( "qunit-filter-passed-tests", "true" );
                    } else {
                        sessionStorage.removeItem( "qunit-filter-passed-tests" );
                    }
                }
            });

            if ( config.hidepassed || defined.sessionStorage && sessionStorage.getItem( "qunit-filter-passed-tests" ) ) {
                filter.checked = true;
                // `ol` initialized at top of scope
                ol = id( "qunit-tests" );
                ol.className = ol.className + " hidepass";
            }
            toolbar.appendChild( filter );

            // `label` initialized at top of scope
            label = document.createElement( "label" );
            label.setAttribute( "for", "qunit-filter-pass" );
            label.setAttribute( "title", "Only show tests and assertions that fail. Stored in sessionStorage." );
            label.innerHTML = "Hide passed tests";
            toolbar.appendChild( label );

            urlConfigCheckboxesContainer = document.createElement("span");
            urlConfigCheckboxesContainer.innerHTML = urlConfigHtml;
            urlConfigCheckboxes = urlConfigCheckboxesContainer.getElementsByTagName("input");
            // For oldIE support:
            // * Add handlers to the individual elements instead of the container
            // * Use "click" instead of "change"
            // * Fallback from event.target to event.srcElement
            addEvents( urlConfigCheckboxes, "click", function( event ) {
                var params = {},
                    target = event.target || event.srcElement;
                params[ target.name ] = target.checked ? true : undefined;
                window.location = QUnit.url( params );
            });
            toolbar.appendChild( urlConfigCheckboxesContainer );

            if (numModules > 1) {
                moduleFilter = document.createElement( "span" );
                moduleFilter.setAttribute( "id", "qunit-modulefilter-container" );
                moduleFilter.innerHTML = moduleFilterHtml;
                addEvent( moduleFilter.lastChild, "change", function() {
                    var selectBox = moduleFilter.getElementsByTagName("select")[0],
                        selectedModule = decodeURIComponent(selectBox.options[selectBox.selectedIndex].value);

                    window.location = QUnit.url({
                        module: ( selectedModule === "" ) ? undefined : selectedModule,
                        // Remove any existing filters
                        filter: undefined,
                        testNumber: undefined
                    });
                });
                toolbar.appendChild(moduleFilter);
            }
        }

        // `main` initialized at top of scope
        main = id( "qunit-fixture" );
        if ( main ) {
            config.fixture = main.innerHTML;
        }

        if ( config.autostart ) {
            QUnit.start();
        }
    };

    if ( defined.document ) {
        addEvent( window, "load", QUnit.load );
    }

// `onErrorFnPrev` initialized at top of scope
// Preserve other handlers
    onErrorFnPrev = window.onerror;

// Cover uncaught exceptions
// Returning true will suppress the default browser handler,
// returning false will let it run.
    window.onerror = function ( error, filePath, linerNr ) {
        var ret = false;
        if ( onErrorFnPrev ) {
            ret = onErrorFnPrev( error, filePath, linerNr );
        }

        // Treat return value as window.onerror itself does,
        // Only do our handling if not suppressed.
        if ( ret !== true ) {
            if ( QUnit.config.current ) {
                if ( QUnit.config.current.ignoreGlobalErrors ) {
                    return true;
                }
                QUnit.pushFailure( error, filePath + ":" + linerNr );
            } else {
                QUnit.test( "global failure", extend( function() {
                    QUnit.pushFailure( error, filePath + ":" + linerNr );
                }, { validTest: validTest } ) );
            }
            return false;
        }

        return ret;
    };

    function done() {
        config.autorun = true;

        // Log the last module results
        if ( config.previousModule ) {
            runLoggingCallbacks( "moduleDone", QUnit, {
                name: config.previousModule,
                failed: config.moduleStats.bad,
                passed: config.moduleStats.all - config.moduleStats.bad,
                total: config.moduleStats.all
            });
        }
        delete config.previousModule;

        var i, key,
            banner = id( "qunit-banner" ),
            tests = id( "qunit-tests" ),
            runtime = +new Date() - config.started,
            passed = config.stats.all - config.stats.bad,
            html = [
                "Tests completed in ",
                runtime,
                " milliseconds.<br/>",
                "<span class='passed'>",
                passed,
                "</span> assertions of <span class='total'>",
                config.stats.all,
                "</span> passed, <span class='failed'>",
                config.stats.bad,
                "</span> failed."
            ].join( "" );

        if ( banner ) {
            banner.className = ( config.stats.bad ? "qunit-fail" : "qunit-pass" );
        }

        if ( tests ) {
            id( "qunit-testresult" ).innerHTML = html;
        }

        if ( config.altertitle && defined.document && document.title ) {
            // show ✖ for good, ✔ for bad suite result in title
            // use escape sequences in case file gets loaded with non-utf-8-charset
            document.title = [
                ( config.stats.bad ? "\u2716" : "\u2714" ),
                document.title.replace( /^[\u2714\u2716] /i, "" )
            ].join( " " );
        }

        // clear own sessionStorage items if all tests passed
        if ( config.reorder && defined.sessionStorage && config.stats.bad === 0 ) {
            // `key` & `i` initialized at top of scope
            for ( i = 0; i < sessionStorage.length; i++ ) {
                key = sessionStorage.key( i++ );
                if ( key.indexOf( "qunit-test-" ) === 0 ) {
                    sessionStorage.removeItem( key );
                }
            }
        }

        // scroll back to top to show results
        if ( window.scrollTo ) {
            window.scrollTo(0, 0);
        }

        runLoggingCallbacks( "done", QUnit, {
            failed: config.stats.bad,
            passed: passed,
            total: config.stats.all,
            runtime: runtime
        });
    }

    /** @return Boolean: true if this test should be ran */
    function validTest( test ) {
        var include,
            filter = config.filter && config.filter.toLowerCase(),
            module = config.module && config.module.toLowerCase(),
            fullName = (test.module + ": " + test.testName).toLowerCase();

        // Internally-generated tests are always valid
        if ( test.callback && test.callback.validTest === validTest ) {
            delete test.callback.validTest;
            return true;
        }

        if ( config.testNumber ) {
            return test.testNumber === config.testNumber;
        }

        if ( module && ( !test.module || test.module.toLowerCase() !== module ) ) {
            return false;
        }

        if ( !filter ) {
            return true;
        }

        include = filter.charAt( 0 ) !== "!";
        if ( !include ) {
            filter = filter.slice( 1 );
        }

        // If the filter matches, we need to honour include
        if ( fullName.indexOf( filter ) !== -1 ) {
            return include;
        }

        // Otherwise, do the opposite
        return !include;
    }

// so far supports only Firefox, Chrome and Opera (buggy), Safari (for real exceptions)
// Later Safari and IE10 are supposed to support error.stack as well
// See also https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error/Stack
    function extractStacktrace( e, offset ) {
        offset = offset === undefined ? 3 : offset;

        var stack, include, i;

        if ( e.stacktrace ) {
            // Opera
            return e.stacktrace.split( "\n" )[ offset + 3 ];
        } else if ( e.stack ) {
            // Firefox, Chrome
            stack = e.stack.split( "\n" );
            if (/^error$/i.test( stack[0] ) ) {
                stack.shift();
            }
            if ( fileName ) {
                include = [];
                for ( i = offset; i < stack.length; i++ ) {
                    if ( stack[ i ].indexOf( fileName ) !== -1 ) {
                        break;
                    }
                    include.push( stack[ i ] );
                }
                if ( include.length ) {
                    return include.join( "\n" );
                }
            }
            return stack[ offset ];
        } else if ( e.sourceURL ) {
            // Safari, PhantomJS
            // hopefully one day Safari provides actual stacktraces
            // exclude useless self-reference for generated Error objects
            if ( /qunit.js$/.test( e.sourceURL ) ) {
                return;
            }
            // for actual exceptions, this is useful
            return e.sourceURL + ":" + e.line;
        }
    }
    function sourceFromStacktrace( offset ) {
        try {
            throw new Error();
        } catch ( e ) {
            return extractStacktrace( e, offset );
        }
    }

    /**
     * Escape text for attribute or text content.
     */
    function escapeText( s ) {
        if ( !s ) {
            return "";
        }
        s = s + "";
        // Both single quotes and double quotes (for attributes)
        return s.replace( /['"<>&]/g, function( s ) {
            switch( s ) {
                case "'":
                    return "&#039;";
                case "\"":
                    return "&quot;";
                case "<":
                    return "&lt;";
                case ">":
                    return "&gt;";
                case "&":
                    return "&amp;";
            }
        });
    }

    function synchronize( callback, last ) {
        config.queue.push( callback );

        if ( config.autorun && !config.blocking ) {
            process( last );
        }
    }

    function process( last ) {
        function next() {
            process( last );
        }
        var start = new Date().getTime();
        config.depth = config.depth ? config.depth + 1 : 1;

        while ( config.queue.length && !config.blocking ) {
            if ( !defined.setTimeout || config.updateRate <= 0 || ( ( new Date().getTime() - start ) < config.updateRate ) ) {
                config.queue.shift()();
            } else {
                setTimeout( next, 13 );
                break;
            }
        }
        config.depth--;
        if ( last && !config.blocking && !config.queue.length && config.depth === 0 ) {
            done();
        }
    }

    function saveGlobal() {
        config.pollution = [];

        if ( config.noglobals ) {
            for ( var key in window ) {
                if ( hasOwn.call( window, key ) ) {
                    // in Opera sometimes DOM element ids show up here, ignore them
                    if ( /^qunit-test-output/.test( key ) ) {
                        continue;
                    }
                    config.pollution.push( key );
                }
            }
        }
    }

    function checkPollution() {
        var newGlobals,
            deletedGlobals,
            old = config.pollution;

        saveGlobal();

        newGlobals = diff( config.pollution, old );
        if ( newGlobals.length > 0 ) {
            QUnit.pushFailure( "Introduced global variable(s): " + newGlobals.join(", ") );
        }

        deletedGlobals = diff( old, config.pollution );
        if ( deletedGlobals.length > 0 ) {
            QUnit.pushFailure( "Deleted global variable(s): " + deletedGlobals.join(", ") );
        }
    }

// returns a new Array with the elements that are in a but not in b
    function diff( a, b ) {
        var i, j,
            result = a.slice();

        for ( i = 0; i < result.length; i++ ) {
            for ( j = 0; j < b.length; j++ ) {
                if ( result[i] === b[j] ) {
                    result.splice( i, 1 );
                    i--;
                    break;
                }
            }
        }
        return result;
    }

    function extend( a, b ) {
        for ( var prop in b ) {
            if ( hasOwn.call( b, prop ) ) {
                // Avoid "Member not found" error in IE8 caused by messing with window.constructor
                if ( !( prop === "constructor" && a === window ) ) {
                    if ( b[ prop ] === undefined ) {
                        delete a[ prop ];
                    } else {
                        a[ prop ] = b[ prop ];
                    }
                }
            }
        }

        return a;
    }

    /**
     * @param {HTMLElement} elem
     * @param {string} type
     * @param {Function} fn
     */
    function addEvent( elem, type, fn ) {
        if ( elem.addEventListener ) {

            // Standards-based browsers
            elem.addEventListener( type, fn, false );
        } else if ( elem.attachEvent ) {

            // support: IE <9
            elem.attachEvent( "on" + type, fn );
        } else {

            // Caller must ensure support for event listeners is present
            throw new Error( "addEvent() was called in a context without event listener support" );
        }
    }

    /**
     * @param {Array|NodeList} elems
     * @param {string} type
     * @param {Function} fn
     */
    function addEvents( elems, type, fn ) {
        var i = elems.length;
        while ( i-- ) {
            addEvent( elems[i], type, fn );
        }
    }

    function hasClass( elem, name ) {
        return (" " + elem.className + " ").indexOf(" " + name + " ") > -1;
    }

    function addClass( elem, name ) {
        if ( !hasClass( elem, name ) ) {
            elem.className += (elem.className ? " " : "") + name;
        }
    }

    function removeClass( elem, name ) {
        var set = " " + elem.className + " ";
        // Class name may appear multiple times
        while ( set.indexOf(" " + name + " ") > -1 ) {
            set = set.replace(" " + name + " " , " ");
        }
        // If possible, trim it for prettiness, but not necessarily
        elem.className = typeof set.trim === "function" ? set.trim() : set.replace(/^\s+|\s+$/g, "");
    }

    function id( name ) {
        return defined.document && document.getElementById && document.getElementById( name );
    }

    function registerLoggingCallback( key ) {
        return function( callback ) {
            config[key].push( callback );
        };
    }

// Supports deprecated method of completely overwriting logging callbacks
    function runLoggingCallbacks( key, scope, args ) {
        var i, callbacks;
        if ( QUnit.hasOwnProperty( key ) ) {
            QUnit[ key ].call(scope, args );
        } else {
            callbacks = config[ key ];
            for ( i = 0; i < callbacks.length; i++ ) {
                callbacks[ i ].call( scope, args );
            }
        }
    }

// from jquery.js
    function inArray( elem, array ) {
        if ( array.indexOf ) {
            return array.indexOf( elem );
        }

        for ( var i = 0, length = array.length; i < length; i++ ) {
            if ( array[ i ] === elem ) {
                return i;
            }
        }

        return -1;
    }

    function Test( settings ) {
        extend( this, settings );
        this.assertions = [];
        this.testNumber = ++Test.count;
    }

    Test.count = 0;

    Test.prototype = {
        init: function() {
            var a, b, li,
                tests = id( "qunit-tests" );

            if ( tests ) {
                b = document.createElement( "strong" );
                b.innerHTML = this.nameHtml;

                // `a` initialized at top of scope
                a = document.createElement( "a" );
                a.innerHTML = "Rerun";
                a.href = QUnit.url({ testNumber: this.testNumber });

                li = document.createElement( "li" );
                li.appendChild( b );
                li.appendChild( a );
                li.className = "running";
                li.id = this.id = "qunit-test-output" + testId++;

                tests.appendChild( li );
            }
        },
        setup: function() {
            if (
                // Emit moduleStart when we're switching from one module to another
            this.module !== config.previousModule ||
                // They could be equal (both undefined) but if the previousModule property doesn't
                // yet exist it means this is the first test in a suite that isn't wrapped in a
                // module, in which case we'll just emit a moduleStart event for 'undefined'.
                // Without this, reporters can get testStart before moduleStart  which is a problem.
            !hasOwn.call( config, "previousModule" )
            ) {
                if ( hasOwn.call( config, "previousModule" ) ) {
                    runLoggingCallbacks( "moduleDone", QUnit, {
                        name: config.previousModule,
                        failed: config.moduleStats.bad,
                        passed: config.moduleStats.all - config.moduleStats.bad,
                        total: config.moduleStats.all
                    });
                }
                config.previousModule = this.module;
                config.moduleStats = { all: 0, bad: 0 };
                runLoggingCallbacks( "moduleStart", QUnit, {
                    name: this.module
                });
            }

            config.current = this;

            this.testEnvironment = extend({
                setup: function() {},
                teardown: function() {}
            }, this.moduleTestEnvironment );

            this.started = +new Date();
            runLoggingCallbacks( "testStart", QUnit, {
                name: this.testName,
                module: this.module
            });

            /*jshint camelcase:false */


            /**
             * Expose the current test environment.
             *
             * @deprecated since 1.12.0: Use QUnit.config.current.testEnvironment instead.
             */
            QUnit.current_testEnvironment = this.testEnvironment;

            /*jshint camelcase:true */

            if ( !config.pollution ) {
                saveGlobal();
            }
            if ( config.notrycatch ) {
                this.testEnvironment.setup.call( this.testEnvironment, QUnit.assert );
                return;
            }
            try {
                this.testEnvironment.setup.call( this.testEnvironment, QUnit.assert );
            } catch( e ) {
                QUnit.pushFailure( "Setup failed on " + this.testName + ": " + ( e.message || e ), extractStacktrace( e, 1 ) );
            }
        },
        run: function() {
            config.current = this;

            var running = id( "qunit-testresult" );

            if ( running ) {
                running.innerHTML = "Running: <br/>" + this.nameHtml;
            }

            if ( this.async ) {
                QUnit.stop();
            }

            this.callbackStarted = +new Date();

            if ( config.notrycatch ) {
                this.callback.call( this.testEnvironment, QUnit.assert );
                this.callbackRuntime = +new Date() - this.callbackStarted;
                return;
            }

            try {
                this.callback.call( this.testEnvironment, QUnit.assert );
                this.callbackRuntime = +new Date() - this.callbackStarted;
            } catch( e ) {
                this.callbackRuntime = +new Date() - this.callbackStarted;

                QUnit.pushFailure( "Died on test #" + (this.assertions.length + 1) + " " + this.stack + ": " + ( e.message || e ), extractStacktrace( e, 0 ) );
                // else next test will carry the responsibility
                saveGlobal();

                // Restart the tests if they're blocking
                if ( config.blocking ) {
                    QUnit.start();
                }
            }
        },
        teardown: function() {
            config.current = this;
            if ( config.notrycatch ) {
                if ( typeof this.callbackRuntime === "undefined" ) {
                    this.callbackRuntime = +new Date() - this.callbackStarted;
                }
                this.testEnvironment.teardown.call( this.testEnvironment, QUnit.assert );
                return;
            } else {
                try {
                    this.testEnvironment.teardown.call( this.testEnvironment, QUnit.assert );
                } catch( e ) {
                    QUnit.pushFailure( "Teardown failed on " + this.testName + ": " + ( e.message || e ), extractStacktrace( e, 1 ) );
                }
            }
            checkPollution();
        },
        finish: function() {
            config.current = this;
            if ( config.requireExpects && this.expected === null ) {
                QUnit.pushFailure( "Expected number of assertions to be defined, but expect() was not called.", this.stack );
            } else if ( this.expected !== null && this.expected !== this.assertions.length ) {
                QUnit.pushFailure( "Expected " + this.expected + " assertions, but " + this.assertions.length + " were run", this.stack );
            } else if ( this.expected === null && !this.assertions.length ) {
                QUnit.pushFailure( "Expected at least one assertion, but none were run - call expect(0) to accept zero assertions.", this.stack );
            }

            var i, assertion, a, b, time, li, ol,
                test = this,
                good = 0,
                bad = 0,
                tests = id( "qunit-tests" );

            this.runtime = +new Date() - this.started;
            config.stats.all += this.assertions.length;
            config.moduleStats.all += this.assertions.length;

            if ( tests ) {
                ol = document.createElement( "ol" );
                ol.className = "qunit-assert-list";

                for ( i = 0; i < this.assertions.length; i++ ) {
                    assertion = this.assertions[i];

                    li = document.createElement( "li" );
                    li.className = assertion.result ? "pass" : "fail";
                    li.innerHTML = assertion.message || ( assertion.result ? "okay" : "failed" );
                    ol.appendChild( li );

                    if ( assertion.result ) {
                        good++;
                    } else {
                        bad++;
                        config.stats.bad++;
                        config.moduleStats.bad++;
                    }
                }

                // store result when possible
                if ( QUnit.config.reorder && defined.sessionStorage ) {
                    if ( bad ) {
                        sessionStorage.setItem( "qunit-test-" + this.module + "-" + this.testName, bad );
                    } else {
                        sessionStorage.removeItem( "qunit-test-" + this.module + "-" + this.testName );
                    }
                }

                if ( bad === 0 ) {
                    addClass( ol, "qunit-collapsed" );
                }

                // `b` initialized at top of scope
                b = document.createElement( "strong" );
                b.innerHTML = this.nameHtml + " <b class='counts'>(<b class='failed'>" + bad + "</b>, <b class='passed'>" + good + "</b>, " + this.assertions.length + ")</b>";

                addEvent(b, "click", function() {
                    var next = b.parentNode.lastChild,
                        collapsed = hasClass( next, "qunit-collapsed" );
                    ( collapsed ? removeClass : addClass )( next, "qunit-collapsed" );
                });

                addEvent(b, "dblclick", function( e ) {
                    var target = e && e.target ? e.target : window.event.srcElement;
                    if ( target.nodeName.toLowerCase() === "span" || target.nodeName.toLowerCase() === "b" ) {
                        target = target.parentNode;
                    }
                    if ( window.location && target.nodeName.toLowerCase() === "strong" ) {
                        window.location = QUnit.url({ testNumber: test.testNumber });
                    }
                });

                // `time` initialized at top of scope
                time = document.createElement( "span" );
                time.className = "runtime";
                time.innerHTML = this.runtime + " ms";

                // `li` initialized at top of scope
                li = id( this.id );
                li.className = bad ? "fail" : "pass";
                li.removeChild( li.firstChild );
                a = li.firstChild;
                li.appendChild( b );
                li.appendChild( a );
                li.appendChild( time );
                li.appendChild( ol );

            } else {
                for ( i = 0; i < this.assertions.length; i++ ) {
                    if ( !this.assertions[i].result ) {
                        bad++;
                        config.stats.bad++;
                        config.moduleStats.bad++;
                    }
                }
            }

            runLoggingCallbacks( "testDone", QUnit, {
                name: this.testName,
                module: this.module,
                failed: bad,
                passed: this.assertions.length - bad,
                total: this.assertions.length,
                runtime: this.runtime,
                // DEPRECATED: this property will be removed in 2.0.0, use runtime instead
                duration: this.runtime,
            });

            QUnit.reset();

            config.current = undefined;
        },

        queue: function() {
            var bad,
                test = this;

            synchronize(function() {
                test.init();
            });
            function run() {
                // each of these can by async
                synchronize(function() {
                    test.setup();
                });
                synchronize(function() {
                    test.run();
                });
                synchronize(function() {
                    test.teardown();
                });
                synchronize(function() {
                    test.finish();
                });
            }

            // `bad` initialized at top of scope
            // defer when previous test run passed, if storage is available
            bad = QUnit.config.reorder && defined.sessionStorage &&
                +sessionStorage.getItem( "qunit-test-" + this.module + "-" + this.testName );

            if ( bad ) {
                run();
            } else {
                synchronize( run, true );
            }
        }
    };

// `assert` initialized at top of scope
// Assert helpers
// All of these must either call QUnit.push() or manually do:
// - runLoggingCallbacks( "log", .. );
// - config.current.assertions.push({ .. });
    assert = QUnit.assert = {
        /**
         * Asserts rough true-ish result.
         * @name ok
         * @function
         * @example ok( "asdfasdf".length > 5, "There must be at least 5 chars" );
         */
        ok: function( result, msg ) {
            if ( !config.current ) {
                throw new Error( "ok() assertion outside test context, was " + sourceFromStacktrace(2) );
            }
            result = !!result;
            msg = msg || ( result ? "okay" : "failed" );

            var source,
                details = {
                    module: config.current.module,
                    name: config.current.testName,
                    result: result,
                    message: msg
                };

            msg = "<span class='test-message'>" + escapeText( msg ) + "</span>";

            if ( !result ) {
                source = sourceFromStacktrace( 2 );
                if ( source ) {
                    details.source = source;
                    msg += "<table><tr class='test-source'><th>Source: </th><td><pre>" +
                        escapeText( source ) +
                        "</pre></td></tr></table>";
                }
            }
            runLoggingCallbacks( "log", QUnit, details );
            config.current.assertions.push({
                result: result,
                message: msg
            });
        },

        /**
         * Assert that the first two arguments are equal, with an optional message.
         * Prints out both actual and expected values.
         * @name equal
         * @function
         * @example equal( format( "Received {0} bytes.", 2), "Received 2 bytes.", "format() replaces {0} with next argument" );
         */
        equal: function( actual, expected, message ) {
            /*jshint eqeqeq:false */
            QUnit.push( expected == actual, actual, expected, message );
        },

        /**
         * @name notEqual
         * @function
         */
        notEqual: function( actual, expected, message ) {
            /*jshint eqeqeq:false */
            QUnit.push( expected != actual, actual, expected, message );
        },

        /**
         * @name propEqual
         * @function
         */
        propEqual: function( actual, expected, message ) {
            actual = objectValues(actual);
            expected = objectValues(expected);
            QUnit.push( QUnit.equiv(actual, expected), actual, expected, message );
        },

        /**
         * @name notPropEqual
         * @function
         */
        notPropEqual: function( actual, expected, message ) {
            actual = objectValues(actual);
            expected = objectValues(expected);
            QUnit.push( !QUnit.equiv(actual, expected), actual, expected, message );
        },

        /**
         * @name deepEqual
         * @function
         */
        deepEqual: function( actual, expected, message ) {
            QUnit.push( QUnit.equiv(actual, expected), actual, expected, message );
        },

        /**
         * @name notDeepEqual
         * @function
         */
        notDeepEqual: function( actual, expected, message ) {
            QUnit.push( !QUnit.equiv(actual, expected), actual, expected, message );
        },

        /**
         * @name strictEqual
         * @function
         */
        strictEqual: function( actual, expected, message ) {
            QUnit.push( expected === actual, actual, expected, message );
        },

        /**
         * @name notStrictEqual
         * @function
         */
        notStrictEqual: function( actual, expected, message ) {
            QUnit.push( expected !== actual, actual, expected, message );
        },

        "throws": function( block, expected, message ) {
            var actual,
                expectedOutput = expected,
                ok = false;

            // 'expected' is optional
            if ( typeof expected === "string" ) {
                message = expected;
                expected = null;
            }

            config.current.ignoreGlobalErrors = true;
            try {
                block.call( config.current.testEnvironment );
            } catch (e) {
                actual = e;
            }
            config.current.ignoreGlobalErrors = false;

            if ( actual ) {
                // we don't want to validate thrown error
                if ( !expected ) {
                    ok = true;
                    expectedOutput = null;
                    // expected is a regexp
                } else if ( QUnit.objectType( expected ) === "regexp" ) {
                    ok = expected.test( errorString( actual ) );
                    // expected is a constructor
                } else if ( actual instanceof expected ) {
                    ok = true;
                    // expected is a validation function which returns true is validation passed
                } else if ( expected.call( {}, actual ) === true ) {
                    expectedOutput = null;
                    ok = true;
                }

                QUnit.push( ok, actual, expectedOutput, message );
            } else {
                QUnit.pushFailure( message, null, "No exception was thrown." );
            }
        }
    };

    /**
     * @deprecated since 1.8.0
     * Kept assertion helpers in root for backwards compatibility.
     */
    extend( QUnit.constructor.prototype, assert );

    /**
     * @deprecated since 1.9.0
     * Kept to avoid TypeErrors for undefined methods.
     */
    QUnit.constructor.prototype.raises = function() {
        QUnit.push( false, false, false, "QUnit.raises has been deprecated since 2012 (fad3c1ea), use QUnit.throws instead" );
    };

    /**
     * @deprecated since 1.0.0, replaced with error pushes since 1.3.0
     * Kept to avoid TypeErrors for undefined methods.
     */
    QUnit.constructor.prototype.equals = function() {
        QUnit.push( false, false, false, "QUnit.equals has been deprecated since 2009 (e88049a0), use QUnit.equal instead" );
    };
    QUnit.constructor.prototype.same = function() {
        QUnit.push( false, false, false, "QUnit.same has been deprecated since 2009 (e88049a0), use QUnit.deepEqual instead" );
    };

// Test for equality any JavaScript type.
// Author: Philippe Rathé <prathe@gmail.com>
    QUnit.equiv = (function() {

        // Call the o related callback with the given arguments.
        function bindCallbacks( o, callbacks, args ) {
            var prop = QUnit.objectType( o );
            if ( prop ) {
                if ( QUnit.objectType( callbacks[ prop ] ) === "function" ) {
                    return callbacks[ prop ].apply( callbacks, args );
                } else {
                    return callbacks[ prop ]; // or undefined
                }
            }
        }

        // the real equiv function
        var innerEquiv,
        // stack to decide between skip/abort functions
            callers = [],
        // stack to avoiding loops from circular referencing
            parents = [],
            parentsB = [],

            getProto = Object.getPrototypeOf || function ( obj ) {
                    /*jshint camelcase:false */
                    return obj.__proto__;
                },
            callbacks = (function () {

                // for string, boolean, number and null
                function useStrictEquality( b, a ) {
                    /*jshint eqeqeq:false */
                    if ( b instanceof a.constructor || a instanceof b.constructor ) {
                        // to catch short annotation VS 'new' annotation of a
                        // declaration
                        // e.g. var i = 1;
                        // var j = new Number(1);
                        return a == b;
                    } else {
                        return a === b;
                    }
                }

                return {
                    "string": useStrictEquality,
                    "boolean": useStrictEquality,
                    "number": useStrictEquality,
                    "null": useStrictEquality,
                    "undefined": useStrictEquality,

                    "nan": function( b ) {
                        return isNaN( b );
                    },

                    "date": function( b, a ) {
                        return QUnit.objectType( b ) === "date" && a.valueOf() === b.valueOf();
                    },

                    "regexp": function( b, a ) {
                        return QUnit.objectType( b ) === "regexp" &&
                                // the regex itself
                            a.source === b.source &&
                                // and its modifiers
                            a.global === b.global &&
                                // (gmi) ...
                            a.ignoreCase === b.ignoreCase &&
                            a.multiline === b.multiline &&
                            a.sticky === b.sticky;
                    },

                    // - skip when the property is a method of an instance (OOP)
                    // - abort otherwise,
                    // initial === would have catch identical references anyway
                    "function": function() {
                        var caller = callers[callers.length - 1];
                        return caller !== Object && typeof caller !== "undefined";
                    },

                    "array": function( b, a ) {
                        var i, j, len, loop, aCircular, bCircular;

                        // b could be an object literal here
                        if ( QUnit.objectType( b ) !== "array" ) {
                            return false;
                        }

                        len = a.length;
                        if ( len !== b.length ) {
                            // safe and faster
                            return false;
                        }

                        // track reference to avoid circular references
                        parents.push( a );
                        parentsB.push( b );
                        for ( i = 0; i < len; i++ ) {
                            loop = false;
                            for ( j = 0; j < parents.length; j++ ) {
                                aCircular = parents[j] === a[i];
                                bCircular = parentsB[j] === b[i];
                                if ( aCircular || bCircular ) {
                                    if ( a[i] === b[i] || aCircular && bCircular ) {
                                        loop = true;
                                    } else {
                                        parents.pop();
                                        parentsB.pop();
                                        return false;
                                    }
                                }
                            }
                            if ( !loop && !innerEquiv(a[i], b[i]) ) {
                                parents.pop();
                                parentsB.pop();
                                return false;
                            }
                        }
                        parents.pop();
                        parentsB.pop();
                        return true;
                    },

                    "object": function( b, a ) {
                        /*jshint forin:false */
                        var i, j, loop, aCircular, bCircular,
                        // Default to true
                            eq = true,
                            aProperties = [],
                            bProperties = [];

                        // comparing constructors is more strict than using
                        // instanceof
                        if ( a.constructor !== b.constructor ) {
                            // Allow objects with no prototype to be equivalent to
                            // objects with Object as their constructor.
                            if ( !(( getProto(a) === null && getProto(b) === Object.prototype ) ||
                                ( getProto(b) === null && getProto(a) === Object.prototype ) ) ) {
                                return false;
                            }
                        }

                        // stack constructor before traversing properties
                        callers.push( a.constructor );

                        // track reference to avoid circular references
                        parents.push( a );
                        parentsB.push( b );

                        // be strict: don't ensure hasOwnProperty and go deep
                        for ( i in a ) {
                            loop = false;
                            for ( j = 0; j < parents.length; j++ ) {
                                aCircular = parents[j] === a[i];
                                bCircular = parentsB[j] === b[i];
                                if ( aCircular || bCircular ) {
                                    if ( a[i] === b[i] || aCircular && bCircular ) {
                                        loop = true;
                                    } else {
                                        eq = false;
                                        break;
                                    }
                                }
                            }
                            aProperties.push(i);
                            if ( !loop && !innerEquiv(a[i], b[i]) ) {
                                eq = false;
                                break;
                            }
                        }

                        parents.pop();
                        parentsB.pop();
                        callers.pop(); // unstack, we are done

                        for ( i in b ) {
                            bProperties.push( i ); // collect b's properties
                        }

                        // Ensures identical properties name
                        return eq && innerEquiv( aProperties.sort(), bProperties.sort() );
                    }
                };
            }());

        innerEquiv = function() { // can take multiple arguments
            var args = [].slice.apply( arguments );
            if ( args.length < 2 ) {
                return true; // end transition
            }

            return (function( a, b ) {
                if ( a === b ) {
                    return true; // catch the most you can
                } else if ( a === null || b === null || typeof a === "undefined" ||
                    typeof b === "undefined" ||
                    QUnit.objectType(a) !== QUnit.objectType(b) ) {
                    return false; // don't lose time with error prone cases
                } else {
                    return bindCallbacks(a, callbacks, [ b, a ]);
                }

                // apply transition with (1..n) arguments
            }( args[0], args[1] ) && innerEquiv.apply( this, args.splice(1, args.length - 1 )) );
        };

        return innerEquiv;
    }());

    /**
     * jsDump Copyright (c) 2008 Ariel Flesler - aflesler(at)gmail(dot)com |
     * http://flesler.blogspot.com Licensed under BSD
     * (http://www.opensource.org/licenses/bsd-license.php) Date: 5/15/2008
     *
     * @projectDescription Advanced and extensible data dumping for Javascript.
     * @version 1.0.0
     * @author Ariel Flesler
     * @link {http://flesler.blogspot.com/2008/05/jsdump-pretty-dump-of-any-javascript.html}
     */
    QUnit.jsDump = (function() {
        function quote( str ) {
            return "\"" + str.toString().replace( /"/g, "\\\"" ) + "\"";
        }
        function literal( o ) {
            return o + "";
        }
        function join( pre, arr, post ) {
            var s = jsDump.separator(),
                base = jsDump.indent(),
                inner = jsDump.indent(1);
            if ( arr.join ) {
                arr = arr.join( "," + s + inner );
            }
            if ( !arr ) {
                return pre + post;
            }
            return [ pre, inner + arr, base + post ].join(s);
        }
        function array( arr, stack ) {
            var i = arr.length, ret = new Array(i);
            this.up();
            while ( i-- ) {
                ret[i] = this.parse( arr[i] , undefined , stack);
            }
            this.down();
            return join( "[", ret, "]" );
        }

        var reName = /^function (\w+)/,
            jsDump = {
                // type is used mostly internally, you can fix a (custom)type in advance
                parse: function( obj, type, stack ) {
                    stack = stack || [ ];
                    var inStack, res,
                        parser = this.parsers[ type || this.typeOf(obj) ];

                    type = typeof parser;
                    inStack = inArray( obj, stack );

                    if ( inStack !== -1 ) {
                        return "recursion(" + (inStack - stack.length) + ")";
                    }
                    if ( type === "function" )  {
                        stack.push( obj );
                        res = parser.call( this, obj, stack );
                        stack.pop();
                        return res;
                    }
                    return ( type === "string" ) ? parser : this.parsers.error;
                },
                typeOf: function( obj ) {
                    var type;
                    if ( obj === null ) {
                        type = "null";
                    } else if ( typeof obj === "undefined" ) {
                        type = "undefined";
                    } else if ( QUnit.is( "regexp", obj) ) {
                        type = "regexp";
                    } else if ( QUnit.is( "date", obj) ) {
                        type = "date";
                    } else if ( QUnit.is( "function", obj) ) {
                        type = "function";
                    } else if ( typeof obj.setInterval !== undefined && typeof obj.document !== "undefined" && typeof obj.nodeType === "undefined" ) {
                        type = "window";
                    } else if ( obj.nodeType === 9 ) {
                        type = "document";
                    } else if ( obj.nodeType ) {
                        type = "node";
                    } else if (
                        // native arrays
                    toString.call( obj ) === "[object Array]" ||
                        // NodeList objects
                    ( typeof obj.length === "number" && typeof obj.item !== "undefined" && ( obj.length ? obj.item(0) === obj[0] : ( obj.item( 0 ) === null && typeof obj[0] === "undefined" ) ) )
                    ) {
                        type = "array";
                    } else if ( obj.constructor === Error.prototype.constructor ) {
                        type = "error";
                    } else {
                        type = typeof obj;
                    }
                    return type;
                },
                separator: function() {
                    return this.multiline ?	this.HTML ? "<br />" : "\n" : this.HTML ? "&nbsp;" : " ";
                },
                // extra can be a number, shortcut for increasing-calling-decreasing
                indent: function( extra ) {
                    if ( !this.multiline ) {
                        return "";
                    }
                    var chr = this.indentChar;
                    if ( this.HTML ) {
                        chr = chr.replace( /\t/g, "   " ).replace( / /g, "&nbsp;" );
                    }
                    return new Array( this.depth + ( extra || 0 ) ).join(chr);
                },
                up: function( a ) {
                    this.depth += a || 1;
                },
                down: function( a ) {
                    this.depth -= a || 1;
                },
                setParser: function( name, parser ) {
                    this.parsers[name] = parser;
                },
                // The next 3 are exposed so you can use them
                quote: quote,
                literal: literal,
                join: join,
                //
                depth: 1,
                // This is the list of parsers, to modify them, use jsDump.setParser
                parsers: {
                    window: "[Window]",
                    document: "[Document]",
                    error: function(error) {
                        return "Error(\"" + error.message + "\")";
                    },
                    unknown: "[Unknown]",
                    "null": "null",
                    "undefined": "undefined",
                    "function": function( fn ) {
                        var ret = "function",
                        // functions never have name in IE
                            name = "name" in fn ? fn.name : (reName.exec(fn) || [])[1];

                        if ( name ) {
                            ret += " " + name;
                        }
                        ret += "( ";

                        ret = [ ret, QUnit.jsDump.parse( fn, "functionArgs" ), "){" ].join( "" );
                        return join( ret, QUnit.jsDump.parse(fn,"functionCode" ), "}" );
                    },
                    array: array,
                    nodelist: array,
                    "arguments": array,
                    object: function( map, stack ) {
                        /*jshint forin:false */
                        var ret = [ ], keys, key, val, i;
                        QUnit.jsDump.up();
                        keys = [];
                        for ( key in map ) {
                            keys.push( key );
                        }
                        keys.sort();
                        for ( i = 0; i < keys.length; i++ ) {
                            key = keys[ i ];
                            val = map[ key ];
                            ret.push( QUnit.jsDump.parse( key, "key" ) + ": " + QUnit.jsDump.parse( val, undefined, stack ) );
                        }
                        QUnit.jsDump.down();
                        return join( "{", ret, "}" );
                    },
                    node: function( node ) {
                        var len, i, val,
                            open = QUnit.jsDump.HTML ? "&lt;" : "<",
                            close = QUnit.jsDump.HTML ? "&gt;" : ">",
                            tag = node.nodeName.toLowerCase(),
                            ret = open + tag,
                            attrs = node.attributes;

                        if ( attrs ) {
                            for ( i = 0, len = attrs.length; i < len; i++ ) {
                                val = attrs[i].nodeValue;
                                // IE6 includes all attributes in .attributes, even ones not explicitly set.
                                // Those have values like undefined, null, 0, false, "" or "inherit".
                                if ( val && val !== "inherit" ) {
                                    ret += " " + attrs[i].nodeName + "=" + QUnit.jsDump.parse( val, "attribute" );
                                }
                            }
                        }
                        ret += close;

                        // Show content of TextNode or CDATASection
                        if ( node.nodeType === 3 || node.nodeType === 4 ) {
                            ret += node.nodeValue;
                        }

                        return ret + open + "/" + tag + close;
                    },
                    // function calls it internally, it's the arguments part of the function
                    functionArgs: function( fn ) {
                        var args,
                            l = fn.length;

                        if ( !l ) {
                            return "";
                        }

                        args = new Array(l);
                        while ( l-- ) {
                            // 97 is 'a'
                            args[l] = String.fromCharCode(97+l);
                        }
                        return " " + args.join( ", " ) + " ";
                    },
                    // object calls it internally, the key part of an item in a map
                    key: quote,
                    // function calls it internally, it's the content of the function
                    functionCode: "[code]",
                    // node calls it internally, it's an html attribute value
                    attribute: quote,
                    string: quote,
                    date: quote,
                    regexp: literal,
                    number: literal,
                    "boolean": literal
                },
                // if true, entities are escaped ( <, >, \t, space and \n )
                HTML: false,
                // indentation unit
                indentChar: "  ",
                // if true, items in a collection, are separated by a \n, else just a space.
                multiline: true
            };

        return jsDump;
    }());

    /*
     * Javascript Diff Algorithm
     *  By John Resig (http://ejohn.org/)
     *  Modified by Chu Alan "sprite"
     *
     * Released under the MIT license.
     *
     * More Info:
     *  http://ejohn.org/projects/javascript-diff-algorithm/
     *
     * Usage: QUnit.diff(expected, actual)
     *
     * QUnit.diff( "the quick brown fox jumped over", "the quick fox jumps over" ) == "the  quick <del>brown </del> fox <del>jumped </del><ins>jumps </ins> over"
     */
    QUnit.diff = (function() {
        /*jshint eqeqeq:false, eqnull:true */
        function diff( o, n ) {
            var i,
                ns = {},
                os = {};

            for ( i = 0; i < n.length; i++ ) {
                if ( !hasOwn.call( ns, n[i] ) ) {
                    ns[ n[i] ] = {
                        rows: [],
                        o: null
                    };
                }
                ns[ n[i] ].rows.push( i );
            }

            for ( i = 0; i < o.length; i++ ) {
                if ( !hasOwn.call( os, o[i] ) ) {
                    os[ o[i] ] = {
                        rows: [],
                        n: null
                    };
                }
                os[ o[i] ].rows.push( i );
            }

            for ( i in ns ) {
                if ( hasOwn.call( ns, i ) ) {
                    if ( ns[i].rows.length === 1 && hasOwn.call( os, i ) && os[i].rows.length === 1 ) {
                        n[ ns[i].rows[0] ] = {
                            text: n[ ns[i].rows[0] ],
                            row: os[i].rows[0]
                        };
                        o[ os[i].rows[0] ] = {
                            text: o[ os[i].rows[0] ],
                            row: ns[i].rows[0]
                        };
                    }
                }
            }

            for ( i = 0; i < n.length - 1; i++ ) {
                if ( n[i].text != null && n[ i + 1 ].text == null && n[i].row + 1 < o.length && o[ n[i].row + 1 ].text == null &&
                    n[ i + 1 ] == o[ n[i].row + 1 ] ) {

                    n[ i + 1 ] = {
                        text: n[ i + 1 ],
                        row: n[i].row + 1
                    };
                    o[ n[i].row + 1 ] = {
                        text: o[ n[i].row + 1 ],
                        row: i + 1
                    };
                }
            }

            for ( i = n.length - 1; i > 0; i-- ) {
                if ( n[i].text != null && n[ i - 1 ].text == null && n[i].row > 0 && o[ n[i].row - 1 ].text == null &&
                    n[ i - 1 ] == o[ n[i].row - 1 ]) {

                    n[ i - 1 ] = {
                        text: n[ i - 1 ],
                        row: n[i].row - 1
                    };
                    o[ n[i].row - 1 ] = {
                        text: o[ n[i].row - 1 ],
                        row: i - 1
                    };
                }
            }

            return {
                o: o,
                n: n
            };
        }

        return function( o, n ) {
            o = o.replace( /\s+$/, "" );
            n = n.replace( /\s+$/, "" );

            var i, pre,
                str = "",
                out = diff( o === "" ? [] : o.split(/\s+/), n === "" ? [] : n.split(/\s+/) ),
                oSpace = o.match(/\s+/g),
                nSpace = n.match(/\s+/g);

            if ( oSpace == null ) {
                oSpace = [ " " ];
            }
            else {
                oSpace.push( " " );
            }

            if ( nSpace == null ) {
                nSpace = [ " " ];
            }
            else {
                nSpace.push( " " );
            }

            if ( out.n.length === 0 ) {
                for ( i = 0; i < out.o.length; i++ ) {
                    str += "<del>" + out.o[i] + oSpace[i] + "</del>";
                }
            }
            else {
                if ( out.n[0].text == null ) {
                    for ( n = 0; n < out.o.length && out.o[n].text == null; n++ ) {
                        str += "<del>" + out.o[n] + oSpace[n] + "</del>";
                    }
                }

                for ( i = 0; i < out.n.length; i++ ) {
                    if (out.n[i].text == null) {
                        str += "<ins>" + out.n[i] + nSpace[i] + "</ins>";
                    }
                    else {
                        // `pre` initialized at top of scope
                        pre = "";

                        for ( n = out.n[i].row + 1; n < out.o.length && out.o[n].text == null; n++ ) {
                            pre += "<del>" + out.o[n] + oSpace[n] + "</del>";
                        }
                        str += " " + out.n[i].text + nSpace[i] + pre;
                    }
                }
            }

            return str;
        };
    }());

// For browser, export only select globals
    if ( typeof window !== "undefined" ) {
        extend( window, QUnit.constructor.prototype );
        window.QUnit = QUnit;
    }

// For CommonJS environments, export everything
    if ( typeof module !== "undefined" && module.exports ) {
        module.exports = QUnit;
    }


// Get a reference to the global object, like window in browsers
}( (function() {
    return this;
})() ));
